/* ============================================================
   固瑞克材料科技 · 工业涂料经销商网站样式表
   ============================================================ */

/* ---- 变量 ---- */
:root {
  --primary: #1a3a5c;       /* 深海蓝 */
  --primary-light: #2a5a8a;
  --accent: #e8701a;        /* 工业橙 */
  --accent-light: #f5a44a;
  --bg-light: #f4f6f9;
  --bg-dark: #0d2137;
  --text: #2c3e50;
  --text-light: #6c7a89;
  --white: #ffffff;
  --border: #dde3ec;
  --shadow: rgba(26, 58, 92, 0.12);
  --radius: 8px;
  --max-w: 1200px;
}

/* ---- 重置 & 基线 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

ul { list-style: none; }

/* ---- 工具类 ---- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 80px 0; }
.section-title {
  text-align: center;
  margin-bottom: 56px;
}
.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.section-title p {
  font-size: 1.05rem;
  color: var(--text-light);
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--accent-light);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 112, 26, 0.35);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

/* ---- 顶部导航 ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-mark {
  width: 42px;
  height: 42px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
  flex-shrink: 0;
}
.logo-text { display: flex; flex-direction: column; }
.logo-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.logo-sub {
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 1px;
}

.nav { display: flex; gap: 4px; }
.nav a {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: all 0.2s;
}
.nav a:hover,
.nav a.active { background: var(--primary); color: var(--white); }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-toggle svg { width: 24px; height: 24px; color: var(--primary); }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  color: var(--white);
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,112,26,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
}
.hero-tag-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent-light);
}
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.hero-stat {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
  margin-bottom: 6px;
}
.hero-stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual-inner {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
}
.hero-visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.hero-vis-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: all 0.3s;
}
.hero-vis-card:hover {
  background: rgba(232,112,26,0.15);
  border-color: rgba(232,112,26,0.4);
}
.hero-vis-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}
.hero-vis-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 4px;
}
.hero-vis-brand {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.5);
}

/* ---- 品牌展示 ---- */
.brands-bar {
  background: var(--bg-light);
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}
.brands-label {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 24px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.brands-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.brand-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.brand-item:hover { opacity: 1; }
.brand-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--white);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  line-height: 1.2;
}
.brand-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

/* ---- 产品分类卡片 ---- */
.prod-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.prod-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s;
  box-shadow: 0 2px 8px var(--shadow);
}
.prod-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px var(--shadow);
  border-color: var(--accent);
}
.prod-card-banner {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.prod-card-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.1);
}
.prod-card-body { padding: 28px 24px; }
.prod-card-type {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 8px;
}
.prod-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.prod-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.6;
}
.prod-card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.prod-tag {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 3px 12px;
  font-size: 0.75rem;
  color: var(--text);
}
.prod-card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.prod-card-link:hover { gap: 8px; }

/* ---- 行业入口 ---- */
.industries-section { background: var(--bg-light); }
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.industry-card {
  background: var(--white);
  border-radius: 12px;
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s;
  cursor: pointer;
}
.industry-card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 24px var(--shadow);
  transform: translateY(-4px);
}
.industry-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}
.industry-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.industry-card p {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ---- 为什么选择我们 ---- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.why-card {
  text-align: center;
  padding: 32px 20px;
}
.why-icon {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--white);
}
.why-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.why-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 64px 0;
  text-align: center;
  color: var(--white);
}
.cta-banner h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-banner p {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
}
.cta-banner .btn-primary {
  background: var(--accent);
  font-size: 1rem;
  padding: 14px 36px;
}

/* ---- 产品详情页 ---- */
.page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 64px 0 48px;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; }
.page-hero p { color: rgba(255,255,255,0.7); font-size: 1rem; }

.breadcrumb {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}
.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: var(--white); }

.product-section { padding: 60px 0; }
.product-section + .product-section { border-top: 1px solid var(--border); }

.product-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.product-row.reverse { direction: rtl; }
.product-row.reverse > * { direction: ltr; }

.product-visual {
  background: var(--bg-light);
  border-radius: 16px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.product-visual-icon { font-size: 5rem; opacity: 0.4; }
.product-info h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.product-info .prod-type {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 8px;
}
.product-info p {
  font-size: 0.92rem;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.7;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.85rem;
}
.spec-table th, .spec-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.spec-table th {
  background: var(--bg-light);
  font-weight: 600;
  color: var(--primary);
  width: 35%;
}
.spec-table td { color: var(--text); }

.brand-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}
.brand-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  transition: all 0.25s;
}
.brand-card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px var(--shadow);
}
.brand-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.brand-card p {
  font-size: 0.8rem;
  color: var(--text-light);
  margin: 0;
}

/* ---- 行业详情页 ---- */
.ind-detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
}
.ind-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 32px 0 12px;
}
.ind-content p { font-size: 0.92rem; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.ind-content ul { margin-bottom: 16px; }
.ind-content li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.6;
}
.ind-content li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.ind-sidebar-card {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 28px;
  border: 1px solid var(--border);
  height: fit-content;
}
.ind-sidebar-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
}
.rel-prod-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.rel-prod-item:last-child { border-bottom: none; }
.rel-prod-item h4 { font-size: 0.88rem; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
.rel-prod-item p { font-size: 0.78rem; color: var(--text-light); }

/* ---- 关于我们 ---- */
.about-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 80px 0;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 16px; }
.about-hero p { font-size: 1rem; color: rgba(255,255,255,0.75); line-height: 1.8; margin-bottom: 32px; }
.about-visual {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.about-stat {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
}
.about-stat-icon { font-size: 2rem; }
.about-stat-text h4 { font-size: 1.3rem; font-weight: 800; color: var(--accent-light); }
.about-stat-text p { font-size: 0.8rem; color: rgba(255,255,255,0.6); }

.about-story { padding: 80px 0; }
.about-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-story h2 { font-size: 1.8rem; font-weight: 700; color: var(--primary); margin-bottom: 20px; }
.about-story p { font-size: 0.95rem; color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.about-story-visual {
  background: var(--bg-light);
  border-radius: 16px;
  height: 300px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  opacity: 0.3;
}

.certs-section { background: var(--bg-light); padding: 60px 0; }
.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cert-card {
  background: var(--white);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.25s;
}
.cert-card:hover { box-shadow: 0 4px 16px var(--shadow); }
.cert-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 12px;
}
.cert-card h4 { font-size: 0.9rem; font-weight: 700; color: var(--primary); }
.cert-card p { font-size: 0.78rem; color: var(--text-light); margin-top: 4px; }

/* ---- 联系页面 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info-card {
  background: var(--bg-light);
  border-radius: 12px;
  padding: 32px;
  border: 1px solid var(--border);
}
.contact-info-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.contact-item-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item-label { font-size: 0.8rem; color: var(--text-light); margin-bottom: 2px; }
.contact-item-value { font-size: 0.95rem; font-weight: 600; color: var(--text); }

.contact-form-wrap h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.1);
}
.form-group textarea { height: 120px; resize: vertical; }

/* ---- 页脚 ---- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.65);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-name { color: var(--white); }
.footer-brand p { font-size: 0.85rem; margin-top: 12px; line-height: 1.6; }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}
.footer-bottom a { color: rgba(255,255,255,0.45); }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .prod-cards { grid-template-columns: 1fr 1fr; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-story-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .product-row { grid-template-columns: 1fr; direction: ltr !important; }
  .ind-detail-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-toggle { display: block; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 56px 0; }
  .prod-cards { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .brands-row { gap: 28px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-btns { flex-direction: column; }
  .certs-grid { grid-template-columns: 1fr; }
  .brand-list { grid-template-columns: 1fr; }
  .page-hero { padding: 48px 0 36px; }
  .page-hero h1 { font-size: 1.7rem; }
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  backdrop-filter: blur(4px);
}
.mobile-nav.open { display: block; }
.mobile-nav-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--white);
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}
.mobile-nav.open .mobile-nav-panel { transform: translateX(0); }
.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.mobile-nav-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--text);
}
.mobile-nav-links a {
  display: block;
  padding: 14px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.mobile-nav-links a:hover { color: var(--accent); }

/* Scroll animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 表格 ---- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.85rem;
}
.data-table th {
  background: var(--primary);
  color: var(--white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}
.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.data-table tr:hover td { background: var(--bg-light); }

/* ============================================================
   SEO增强 + 参考网站元素
   ============================================================ */

/* ---- 热门关键词栏 ---- */
.hot-keywords-bar {
  background: var(--primary);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 0;
}
.hot-keywords-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  flex-wrap: wrap;
}
.hot-keywords-label {
  color: rgba(255,255,255,0.5);
  font-size: 0.78rem;
  white-space: nowrap;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.hot-keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}
.hot-keywords-list a {
  color: rgba(255,255,255,0.75);
  font-size: 0.8rem;
  padding: 2px 10px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  transition: all 0.2s;
  text-decoration: none;
}
.hot-keywords-list a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---- 右侧悬浮联系CTA ---- */
.floating-cta {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
.floating-cta a,
.floating-cta button {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.floating-cta a:hover,
.floating-cta button:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.cta-phone {
  background: var(--accent);
  color: #fff;
}
.cta-wechat {
  background: #07c160;
  color: #fff;
}
.cta-top {
  background: var(--primary);
  color: #fff;
}
.cta-tooltip {
  position: absolute;
  right: 62px;
  background: #333;
  color: #fff;
  font-size: 0.78rem;
  padding: 5px 10px;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}
.floating-cta > div { position: relative; }
.floating-cta > div:hover .cta-tooltip { opacity: 1; }

/* ---- 产品页侧边栏 ---- */
.products-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
  padding: 48px 0 64px;
}
.product-sidebar {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 20px 0;
  position: sticky;
  top: 24px;
  border: 1px solid var(--border);
}
.sidebar-title {
  padding: 0 20px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.sidebar-nav { list-style: none; }
.sidebar-nav li a {
  display: block;
  padding: 10px 20px;
  font-size: 0.88rem;
  color: var(--text);
  border-left: 3px solid transparent;
  transition: all 0.2s;
  text-decoration: none;
}
.sidebar-nav li a:hover,
.sidebar-nav li a.active {
  background: rgba(26,58,92,0.06);
  border-left-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.sidebar-nav li ul {
  list-style: none;
  padding-left: 16px;
}
.sidebar-nav li ul li a {
  font-size: 0.82rem;
  color: var(--text-light);
  padding: 7px 20px;
}
.sidebar-contact {
  margin: 16px;
  padding: 14px;
  background: var(--primary);
  border-radius: var(--radius);
  color: #fff;
  text-align: center;
}
.sidebar-contact p { font-size: 0.8rem; margin-bottom: 8px; opacity: 0.8; }
.sidebar-contact .tel {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.sidebar-contact .email { font-size: 0.78rem; margin-top: 4px; }

/* ---- 产品页品牌导航（独立展示） ---- */
.brand-filter-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--border);
}
.brand-filter-nav a {
  padding: 7px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid var(--border);
  color: var(--text);
  text-decoration: none;
  transition: all 0.2s;
}
.brand-filter-nav a:hover,
.brand-filter-nav a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ---- 内页布局容器 ---- */
.page-content-wrap {
  padding: 48px 0 64px;
}

@media (max-width: 768px) {
  .products-layout { grid-template-columns: 1fr; }
  .product-sidebar { position: static; }
  .floating-cta { right: 12px; bottom: 16px; }
  .floating-cta a, .floating-cta button { width: 46px; height: 46px; font-size: 1.2rem; }
  .hot-keywords-inner { padding: 6px 0; }
}

/* ============================================================
   模块化扩展样式
   ============================================================ */

/* ---- 新闻列表页 ---- */
.news-page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 64px 0;
}
.news-page-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.news-page-hero p { font-size: 0.95rem; color: rgba(255,255,255,0.65); }

.news-categories {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.news-cat-btn {
  padding: 8px 22px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 2px solid var(--border);
  color: var(--text);
  background: var(--white);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.news-cat-btn:hover,
.news-cat-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.news-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  padding: 48px 0 80px;
}
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-card {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.25s;
  text-decoration: none;
  color: inherit;
}
.news-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 24px var(--shadow);
  transform: translateY(-2px);
}
.news-card-img {
  height: 140px;
  object-fit: cover;
  display: block;
  width: 100%;
}
.news-card-body {
  padding: 20px 20px 20px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.news-card-date {
  font-size: 0.78rem;
  color: var(--text-light);
}
.news-card-cat {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(232,112,26,0.1);
  padding: 2px 8px;
  border-radius: 4px;
}
.news-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.news-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-more {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}

.news-card.featured {
  grid-template-columns: 1fr;
}
.news-card.featured .news-card-img {
  height: 240px;
}
.news-card.featured .news-card-body {
  padding: 20px;
}
.news-card.featured h3 { font-size: 1.2rem; }

/* ---- 新闻侧边栏 ---- */
.news-sidebar-widget {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}
.news-sidebar-widget h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
}
.recent-news-item {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
}
.recent-news-item:last-child { border-bottom: none; }
.recent-news-item h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.recent-news-item span { font-size: 0.75rem; color: var(--text-light); }
.recent-news-item:hover h4 { color: var(--accent); }

/* ---- 关于我们页侧边栏 ---- */
.about-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
  padding: 48px 0 80px;
}
.about-sidebar {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: sticky;
  top: 24px;
}
.about-sidebar-menu { list-style: none; }
.about-sidebar-menu li a {
  display: block;
  padding: 14px 20px;
  font-size: 0.9rem;
  color: var(--text);
  border-left: 3px solid transparent;
  transition: all 0.2s;
  text-decoration: none;
}
.about-sidebar-menu li a:hover,
.about-sidebar-menu li a.active {
  background: rgba(26,58,92,0.06);
  border-left-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

/* ---- 客户案例页 ---- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 48px 0 80px;
}
.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.25s;
}
.case-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 24px var(--shadow);
  transform: translateY(-3px);
}
.case-card-img {
  height: 180px;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  opacity: 0.3;
  border-bottom: 1px solid var(--border);
}
.case-card-body { padding: 20px; }
.case-card-industry {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(232,112,26,0.1);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
}
.case-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.case-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; }
.case-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.case-tag {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  background: var(--bg-light);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ---- 模块化产品详情页通用卡片 ---- */
.module-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.25s;
}
.module-card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px var(--shadow);
  transform: translateY(-2px);
}
.module-card-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  opacity: 0.3;
}
.module-card-body { padding: 20px; }
.module-card-type {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.module-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.module-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}
.module-card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.module-card-link:hover { color: var(--primary); }

/* ---- 产品分类入口（首页/行业页） ---- */
.product-category-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.25s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.product-category-card:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 24px var(--shadow);
  transform: translateY(-3px);
}
.product-category-banner {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.product-category-body { padding: 20px; }
.product-category-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.product-category-body p {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ---- 扩展响应式 ---- */
@media (max-width: 1024px) {
  .news-layout { grid-template-columns: 1fr; }
  .news-sidebar { display: none; }
  .case-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .about-layout { grid-template-columns: 1fr; }
  .about-sidebar { position: static; }
  .news-card { grid-template-columns: 1fr; }
  .news-card-img { height: 180px; }
  .case-grid { grid-template-columns: 1fr; }
}